From patchwork Tue Feb 7 13:39:45 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeeja KP X-Patchwork-Id: 9560099 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E0F8D6047A for ; Tue, 7 Feb 2017 13:28:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D0BD9268AE for ; Tue, 7 Feb 2017 13:28:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C1F9528173; Tue, 7 Feb 2017 13:28:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F24A2268AE for ; Tue, 7 Feb 2017 13:28:50 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 6BE5C266DF2; Tue, 7 Feb 2017 14:28:46 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id CC8BB26686E; Tue, 7 Feb 2017 14:28:44 +0100 (CET) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by alsa0.perex.cz (Postfix) with ESMTP id 36F7A266DF2 for ; Tue, 7 Feb 2017 14:28:39 +0100 (CET) Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 07 Feb 2017 05:28:31 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,346,1477983600"; d="scan'208";a="222331130" Received: from unknown (HELO kpjeeja-desk.iind.intel.com) ([10.223.96.110]) by fmsmga004.fm.intel.com with ESMTP; 07 Feb 2017 05:28:29 -0800 From: jeeja.kp@intel.com To: alsa-devel@alsa-project.org Date: Tue, 7 Feb 2017 19:09:45 +0530 Message-Id: <1486474800-11426-2-git-send-email-jeeja.kp@intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1486474800-11426-1-git-send-email-jeeja.kp@intel.com> References: <1486474800-11426-1-git-send-email-jeeja.kp@intel.com> Cc: tiwai@suse.de, patches.audio@intel.com, broonie@kernel.org, liam.r.girdwood@intel.com, Jeeja KP Subject: [alsa-devel] [PATCH 01/16] ASoC: hdac_hdmi: Add MST verb support X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jeeja KP To support DP MST audio, new pin verbs/params are added. This patch adds helper functions to do following: o To set a specific port o To get the currently selected port o To get the length of port. Signed-off-by: Jeeja KP --- sound/soc/codecs/hdac_hdmi.c | 70 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c index 17a1ad3..84b7d6c 100644 --- a/sound/soc/codecs/hdac_hdmi.c +++ b/sound/soc/codecs/hdac_hdmi.c @@ -142,6 +142,76 @@ hdac_hdmi_get_pcm_from_cvt(struct hdac_hdmi_priv *hdmi, return pcm; } +/* MST supported verbs */ +/* + * Get the no devices that can be connected to a port on the Pin widget. + */ +static int hdac_hdmi_get_port_len(struct hdac_ext_device *hdac, hda_nid_t nid) +{ + unsigned int caps; + unsigned int type, param; + + caps = get_wcaps(&hdac->hdac, nid); + type = get_wcaps_type(caps); + + if (!(caps & AC_WCAP_DIGITAL) || (type != AC_WID_PIN)) + return 0; + + param = snd_hdac_read_parm_uncached(&hdac->hdac, nid, + AC_PAR_DEVLIST_LEN); + if (param == -1) + return param; + + return param & AC_DEV_LIST_LEN_MASK; +} + +/* + * Get the port entry select on the pin. Return the port entry + * id selected on the pin. Return 0 means the first port entry + * is selected or MST is not supported. + */ +static int hdac_hdmi_port_select_get(struct hdac_ext_device *hdac, + struct hdac_hdmi_port *port) +{ + return snd_hdac_codec_read(&hdac->hdac, port->pin->nid, + 0, AC_VERB_GET_DEVICE_SEL, 0); +} + +/* + * Sets the selected port entry for the configuring Pin widget verb. + * returns error if port set is not equal to port get otherwise success + */ +static int hdac_hdmi_port_select_set(struct hdac_ext_device *hdac, + struct hdac_hdmi_port *port) +{ + int num_ports; + + if (!port->pin->mst_capable) + return 0; + + /* AC_PAR_DEVLIST_LEN is 0 based. */ + num_ports = hdac_hdmi_get_port_len(hdac, port->pin->nid); + + if (num_ports < 0) + return -EIO; + /* + * Device List Length is a 0 based integer value indicating the + * number of sink device that a MST Pin Widget can support. + */ + if (num_ports + 1 < port->id) + return 0; + + snd_hdac_codec_write(&hdac->hdac, port->pin->nid, 0, + AC_VERB_SET_DEVICE_SEL, port->id); + + if (port->id != hdac_hdmi_port_select_get(hdac, port)) + return -EIO; + + dev_dbg(&hdac->hdac.dev, "Selected the port=%d\n", port->id); + + return 0; +} + static struct hdac_hdmi_pcm *get_hdmi_pcm_from_id(struct hdac_hdmi_priv *hdmi, int pcm_idx) {